Under the least squares assumptions for the multiple regress…

Under the least squares assumptions for the multiple regression model (zero conditional mean for the error term, all Xi and Yi being i.i.d., all Xi and ui having finite fourth moments, no perfect multicollinearity), the OLS estimators for the slopes and intercept (check all that apply):

A 26 year old woman presents with chief complaint of a rash…

A 26 year old woman presents with chief complaint of a rash that itches.  She states she has had this kind of rash for several years which comes and goes and usually appears behind her knees and on the front of her arm at the bend of her elbow.  She denies recent exposure to outdoor plants nor has she changed any soaps or detergents.  On inspection, you note the rash is dry with erythema and scaly patches as seen in this photograph. What is the most likely diagnosis?